<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box1 {
            width: 200px;
            height: 200px;
            background-color: bisque;
            /* border: 5px solid red; */
            /* border-width: 5px;
            border-style: dashed;
            border-color: blueviolet; */
            /* border-bottom: 1px solid red; */
            /* border-left-color: red;
            border-left-style: solid;
            border-left-width: 2px;
            border-bottom-color: blue;
            border-bottom-style: dashed;
            border-bottom-width: 2px; */
            margin-bottom: 100px;
            overflow: hidden;
        }

        .box2 {
            width: 100px;
            height: 100px;
            border: 5px solid blue;
            margin-top: 50px;
            padding: 50px;
        }

        .box3 {
            width: 50px;
            height: 50px;
            background-color: chartreuse;
            margin-top: 100px;
        }
    </style>
</head>

<body>
    <div class="box1">
        <div class="box3"></div>
    </div>
    <div class="box2"></div>
</body>

</html>